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Nodes · Color

ColorCurves

Colorv1core

Overview

Per-channel curves — click to add points, shape the response exactly. The surgical grade.

How to

How-to

Click a curve to add points and drag them; y shapes all channels, red / green / blue one each.
The hue and saturation curves (hue_sat, lum_sat…) are indexed by the input's hue, luminance or saturation.
domain = shaper runs the stack in ACEScct so mid-grey sits at 0.5; high_clip / low_clip soft-limit the ends.

Inputs

Input	What it takes
in	the image this node works on
mask	limits the effect to this matte — the engine's universal mask slot, applied for every node that declares it

Outputs

Output	Type
out	Image

Parameters

Parameter	Type	Default	What it does
y	Lut	2 points	The master curve on luminance.
red	Lut	2 points	A per-channel curve: input along the bottom, output up the side.
green	Lut	2 points	A per-channel curve: input along the bottom, output up the side.
blue	Lut	2 points	A per-channel curve: input along the bottom, output up the side.
hue_hue	Lut	7 points	Hue vs hue: shift each hue by degrees.
hue_sat	Lut	7 points	Hue vs saturation: scale saturation per hue.
hue_lum	Lut	7 points	Hue vs luminance: scale brightness per hue.
lum_sat	Lut	3 points	Luminance vs saturation: scale saturation by brightness.
sat_sat	Lut	3 points	Saturation vs saturation: reshape saturation by how saturated a pixel already is.
sat_lum	Lut	3 points	Saturation vs luminance: scale brightness by saturation.
high_clip	Float	1.0	Values above this are clipped — with high_soft, rolled off toward it.
high_soft	Float	0.0	How softly the high clip rolls off (0 = hard).
low_clip	Float	0.0	Values below this are clipped — with low_soft, rolled off toward it.
low_soft	Float	0.0	How softly the low clip rolls off (0 = hard).
domain	Choice	linear	The space the curves are drawn in: linear (the working space as-is) or the shaper (the config's log working space, ACEScct in the shipped config) — where a curve over a wide range is actually editable. `linearshaper`
disabled	Bool	false	Bypass: the node passes its first input through untouched (D in the graph). The knobs keep their values for when it comes back.
label	Text		A note shown under the node in the graph — what this node is FOR. Never affects the render or the cache.
hide_input	Bool	false	Draw the node without its input wire — a tidy graph for a node whose source is obvious (a Dot, a viewer tap).

See also

Colour (MasterColor) — How to do a grade as one thought instead of eleven nodes.